The first man shook his head at the red indicator.
Most of the dials were lit up, with little red indicators moving across their faces.
I noticed one dial that was dark, its red indicator still.
He touched a button, a red indicator blinked, near the side of the display.
The little red indicator that moves along with the ball on this typewriter now appears to be made of arterial blood.
She looked at the glowing red indicator, like a drop of blood, but did not move.
An instant later, the red alert indicators blinked off, replaced by the standard lighting of alpha shift.
The red digital indicator on the front read "16," ticking occasionally to "17."
Scorpio saw a cluster of red indicators appear on his read-out.
Amid the multitude of stars, there was one that coincided with a red stationary indicator.